XK0-006 · Question #75
An average of one out of three users in a company cannot reach the company website. A Linux administrator determines that one of the three website servers is down. The administrator inspects the DNS…
The correct answer is D. DNS returns all three records in a different order each time, and the browser typically uses the. With multiple A records, DNS performs simple round-robin ordering and returns the records in a different sequence on each query. Most clients try the first address returned-so when the downed server’s IP appears first (about one in three times), those users cannot connect.
Question
An average of one out of three users in a company cannot reach the company website. A Linux administrator determines that one of the three website servers is down. The administrator inspects the DNS configuration for the website and notices the following entry:
Which of the following accurately explains the issue?
Options
- AThe DNS configuration is missing corresponding AAAA records and PTR records, and this is
- BThe administrator has incorrectly configured the DNS server to be an iterative resolver instead of
- COne of the DNS records has not been signed with a DNSSEC-supported key, and this is causing
- DDNS returns all three records in a different order each time, and the browser typically uses the
How the community answered
(36 responses)- A8% (3)
- B6% (2)
- C19% (7)
- D67% (24)
Explanation
With multiple A records, DNS performs simple round-robin ordering and returns the records in a different sequence on each query. Most clients try the first address returned-so when the downed server’s IP appears first (about one in three times), those users cannot connect.
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